The spelling with a 'k' is more canon (referring to the term from Heinlein) and that was the spelling in the tech culture that borrowed it... what is the reason for choosing a 'q' in theirs, do you know?
Pretty silly to name your company a common word directly related to the product, then get upset at others using that same word for their product. It’s like if Grindr made angle grinders then got mad at a different company releasing an angle grinder they called “Grinder”.